var type;

layui.config({
    base: basePath,
    version: skyeyeVersion
}).extend({
    window: 'js/winui.window'
}).define(['window', 'jquery', 'winui', 'webuploader'], function (exports) {
    winui.renderColor();
    var index = parent.layer.getFrameIndex(window.name);
    var $ = layui.$,
        form = layui.form;
    type = GetUrlParam("type");
    if (isNull(type)) {
        winui.window.msg('文件类型不能为空.', {icon: 2, time: 2000});
        return false;
    }

    // 初始化上传
    loadUploadMethod();
    matchingLanguage();
    form.render();
    form.on('submit(fileUploadStart)', function (data) {
        if (winui.verifyForm(data.elem)) {
            uoloadObj.upload();
        }
        return false;
    });
});

function loadUploadMethod(){
    $wrap = $('#uploader'),
    // 文件容器
    $queue = $('<ul class="filelist"></ul>').appendTo( $wrap.find('.queueList') ),
    // 状态栏，包括进度和控制按钮
    $statusBar = $wrap.find('.statusBar'),
    // 文件总体选择信息。
    $info = $statusBar.find('.info'),
    // 上传按钮
    $upload = $wrap.find('.uploadBtn'),
    // 没选择文件之前的内容。
    $placeHolder = $wrap.find('.placeholder'),
    // 总体进度条
    $progress = $statusBar.find('.progress').hide(),
    // 添加的文件数量
    fileCount = 0,
    // 添加的文件总大小
    fileSize = 0,
    // 优化retina, 在retina下这个值是2
    ratio = window.devicePixelRatio || 1,
    // 缩略图大小
    thumbnailWidth = 110 * ratio,
    thumbnailHeight = 110 * ratio,
    // 可能有pedding, ready, uploading, confirm, done.
    state = 'pedding',
    // 所有文件的进度信息，key为file id
    percentages = {},
    supportTransition = (function(){
        var s = document.createElement('p').style,
            r = 'transition' in s ||
                'WebkitTransition' in s ||
                'MozTransition' in s ||
                'msTransition' in s ||
                'OTransition' in s;
        s = null;
        return r;
    })(),
    // WebUploader实例
    uploader;
    if (!WebUploader.Uploader.support()) {
        alert( 'Web Uploader 不支持您的浏览器！如果你使用的是IE浏览器，请尝试升级 flash 播放器');
        throw new Error( 'WebUploader does not support the browser you are using.' );
    }

    var md5;
    // 监听分块上传过程中的三个时间点
    WebUploader.Uploader.register({
        "before-send-file": "beforeSendFile",
        "before-send": "beforeSend",
        "after-send-file": "afterSendFile"
    }, {
        // 时间点1：所有分块进行上传之前调用此函数
        beforeSendFile: function(file) {
            var deferred = WebUploader.Deferred();
            //1、计算文件的唯一标记，用于断点续传
            (new WebUploader.Uploader()).md5File(file, 0, 10 * 1024 * 1024)
                .progress(function(percentage) {
                    $('#' + file.id).find("p.state").text("正在读取文件信息...");
                })
                .then(function(val) {
                    md5 = val;
                    $('#' + file.id).find("p.state").text("成功获取文件信息...");
                    //获取文件信息后进入下一步
                    deferred.resolve();
                });
            return deferred.promise();
        },
        // 时间点2：如果有分块上传，则每个分块上传之前调用此函数
        beforeSend: function(block) {
            var deferred = WebUploader.Deferred();
            var params = {
                md5: md5,
                chunk: block.chunk,
                chunkSize: block.end - block.start
            };
            // 判断指定块是否已经上传
            AjaxPostUtil.request({url: reqBasePath + "checkUploadFileChunks", params: params, type: 'json', method: 'POST', callback: function (json) {
                // 分块存在，跳过
                deferred.reject();
            }, errorCallback: function () {
                //分块不存在或不完整，重新发送该分块内容
                deferred.resolve();
            }, async: false});
            this.owner.options.formData.md5 = md5;
            deferred.resolve();
            return deferred.promise();
        },
        // 时间点3：所有分块上传成功后调用此函数
        afterSendFile: function (data) {
            var params = {
                md5: md5,
                name: data.name,
                size: data.size,
                type: type
            };
            // 如果分块上传成功，则通知后台合并分块
            AjaxPostUtil.request({url: reqBasePath + "skyeyeUploadFileChunks", params: params, type: 'json', method: 'POST', callback: function (json) {
                if (typeof(parent.uploadFileCallback) == "function") {
                    parent.uploadFileCallback(json);
                }
            }});
        }
    });

    // 实例化
    uploader = WebUploader.create({
        pick: {
            id: '#filePicker',
            label: '选择文件'
        },
        dnd: '#uploader .queueList',
        paste: document.body,
        // swf文件路径
        swf: fileBasePath + '/assets/images/Uploader.swf',
        disableGlobalDnd: true,//是否禁掉整个页面的拖拽功能
        chunked: true,//是否要分片处理大文件上传
        chunkSize: 10 * 1024 * 1024,
        chunkRetry: 3,//网络问题上传失败后重试次数
        threads: 1, //上传并发数
        fileSizeLimit: 2000 * 1024 * 1024,//最大2GB
        fileSingleSizeLimit: 2000 * 1024 * 1024,
        resize: false,//不压缩
        server: reqBasePath + 'skyeyeUploadFile',
        fileNumLimit: 300
    });
    // 添加“添加文件”的按钮，
    uploader.addButton({
        id: '#filePicker2',
        label: '继续添加'
    });
    uploader.onUploadProgress = function (file, percentage) {
        var $li = $('#' + file.id),
            $percent = $li.find('.progress span');
        $percent.css('width', percentage * 100 + '%');
        percentages[file.id][1] = percentage;
        updateTotalProgress();
    };
    uploader.onFileQueued = function (file) {
        fileCount++;
        fileSize += file.size;
        if (fileCount === 1) {
            $placeHolder.addClass('element-invisible');
            $statusBar.show();
        }
        addFile(file);
        setState('ready');
        updateTotalProgress();
    };
    uploader.onFileDequeued = function (file) {
        fileCount--;
        fileSize -= file.size;
        if (!fileCount) {
            setState('pedding');
        }
        removeFile(file);
        updateTotalProgress();
    };
    uploader.on('all', function (type) {
        switch (type) {
            case 'uploadFinished':
                setState('confirm');
                break;
            case 'startUpload':
                setState('uploading');
                break;
            case 'stopUpload':
                setState('paused');
                break;
        }
    });
    uploader.on('uploadBeforeSend', function(block, data, headers) {
        headers['X-Requested-With']=  'XMLHttpRequest';
        $.extend(headers, getRequestHeaders());
        data.type = type;
        data.md5 = md5;
        data.chunk = block.chunk;
        data.chunkSize = block.end - block.start;
    });
    uploader.onError = function(code) {
        alert('Eroor: ' + code);
    };
    $upload.on('click', function() {
        if ($(this).hasClass('disabled')) {
            return false;
        }
        if (state === 'ready') {
            uploader.upload();
        } else if (state === 'paused') {
            uploader.upload();
        } else if (state === 'uploading') {
            uploader.stop(true);
        }
    });
    $info.on('click', '.retry', function() {
        uploader.retry();
    });
    $info.on('click', '.ignore', function() {
        alert('todo');
    });
    $upload.addClass('state-' + state);
    updateTotalProgress();
}

//当有文件添加进来时执行，负责view的创建
function addFile( file ) {
    var $li = $( '<li id="' + file.id + '">' + '<p class="title">' + file.name + '</p>' + '<p class="imgWrap"></p>' + '<p class="progress"><span></span></p>' + '</li>' ),
        $btns = $('<div class="file-panel">' + '<span class="cancel">删除</span>' + '<span class="rotateRight">向右旋转</span>' + '<span class="rotateLeft">向左旋转</span></div>').appendTo( $li ),
        $prgress = $li.find('p.progress span'),
        $wrap = $li.find( 'p.imgWrap' ),
        $info = $('<p class="error"></p>'),
        showError = function (code) {
            switch (code) {
                case 'exceed_size':
                    text = '文件大小超出';
                    break;

                case 'interrupt':
                    text = '上传暂停';
                    break;

                default:
                    text = '上传失败，请重试';
                    break;
            }
            $info.text(text).appendTo($li);
        };
    if (file.getStatus() === 'invalid') {
        showError(file.statusText);
    } else {
        $wrap.text('预览中');
        uploader.makeThumb(file, function (error, src) {
            if (error) {
                $wrap.text('不能预览');
                return;
            }
            var img = $('<img src="' + src + '">');
            $wrap.empty().append(img);
        }, thumbnailWidth, thumbnailHeight);
        percentages[file.id] = [file.size, 0];
        file.rotation = 0;
    }
    file.on('statuschange', function(cur, prev) {
        if (prev === 'progress') {
            $prgress.hide().width(0);
        } else if (prev === 'queued') {
            $li.off('mouseenter mouseleave');
            $btns.remove();
        }
        // 成功
        if (cur === 'error' || cur === 'invalid') {
            showError(file.statusText);
            percentages[file.id][1] = 1;
        } else if (cur === 'interrupt') {
            showError('interrupt');
        } else if (cur === 'queued') {
            percentages[file.id][1] = 0;
        } else if (cur === 'progress') {
            $info.remove();
            $prgress.css('display', 'block');
        } else if (cur === 'complete') {
            $li.append('<span class="success"></span>');
        }
        $li.removeClass( 'state-' + prev ).addClass( 'state-' + cur );
    });
    $li.on( 'mouseenter', function() {
        $btns.stop().animate({height: 30});
    });
    $li.on( 'mouseleave', function() {
        $btns.stop().animate({height: 0});
    });
    $btns.on( 'click', 'span', function() {
        var index = $(this).index(), deg;
        switch (index) {
            case 0:
                uploader.removeFile(file);
                return;

            case 1:
                file.rotation += 90;
                break;

            case 2:
                file.rotation -= 90;
                break;
        }
        if (supportTransition) {
            deg = 'rotate(' + file.rotation + 'deg)';
            $wrap.css({
                '-webkit-transform': deg,
                '-mos-transform': deg,
                '-o-transform': deg,
                'transform': deg
            });
        } else {
            $wrap.css('filter', 'progid:DXImageTransform.Microsoft.BasicImage(rotation=' + (~~((file.rotation / 90) % 4 + 4) % 4) + ')');
        }
    });
    $li.appendTo($queue);
}

// 负责view的销毁
function removeFile(file) {
    var $li = $('#' + file.id);
    delete percentages[file.id];
    updateTotalProgress();
    $li.off().find('.file-panel').off().end().remove();
}

function updateTotalProgress() {
    var loaded = 0,
        total = 0,
        spans = $progress.children(),
        percent;
    $.each(percentages, function (k, v) {
        total += v[0];
        loaded += v[0] * v[1];
    });
    percent = total ? loaded / total : 0;
    spans.eq(0).text(Math.round(percent * 100) + '%');
    spans.eq(1).css('width', Math.round(percent * 100) + '%');
    updateStatus();
}

function updateStatus() {
    var text = '', stats;
    if (state === 'ready') {
        text = '选中' + fileCount + '个文件，共' + WebUploader.formatSize(fileSize) + '。';
    } else if (state === 'confirm') {
        stats = uploader.getStats();
        if (stats.uploadFailNum) {
            text = '已成功上传' + stats.successNum + '个照片至服务器，' + stats.uploadFailNum + '个文件上传失败，<a class="retry" href="#">重新上传</a>失败文件或<a class="ignore" href="#">忽略</a>'
        }
    } else {
        stats = uploader.getStats();
        text = '共' + fileCount + '张（' + WebUploader.formatSize(fileSize) + '），已上传' + stats.successNum + '张';
        if (stats.uploadFailNum) {
            text += '，失败' + stats.uploadFailNum + '张';
        }
    }
    $info.html(text);
}

function setState(val) {
    var file, stats;
    if (val === state) {
        return;
    }
    $upload.removeClass('state-' + state);
    $upload.addClass('state-' + val);
    state = val;
    switch (state) {
        case 'pedding':
            $placeHolder.removeClass('element-invisible');
            $queue.parent().removeClass('filled');
            $queue.hide();
            $statusBar.addClass('element-invisible');
            uploader.refresh();
            break;
        case 'ready':
            $placeHolder.addClass('element-invisible');
            $('#filePicker2').removeClass('element-invisible');
            $queue.parent().addClass('filled');
            $queue.show();
            $statusBar.removeClass('element-invisible');
            uploader.refresh();
            break;
        case 'uploading':
            $('#filePicker2').addClass('element-invisible');
            $progress.show();
            $upload.text('暂停上传');
            break;
        case 'paused':
            $progress.show();
            $upload.text('继续上传');
            break;
        case 'confirm':
            $progress.hide();
            $upload.text('开始上传').addClass('disabled');
            stats = uploader.getStats();
            if (stats.successNum && !stats.uploadFailNum) {
                setState('finish');
                return;
            }
            break;
        case 'finish':
            stats = uploader.getStats();
            if (stats.successNum) {
                alert('上传成功');
            } else {
                // 没有成功的文件，重设
                state = 'done';
                location.reload();
            }
            break;
    }
    updateStatus();
}

